简述:结构化描述intent匹配的信息。包含:action,categories and data(via type,scheme ,path),还有priority, to order multiple matching filters.
IntentFilter 中如果action为空,则视为通配符,如果type为空,则intent必须不设type,否则匹配不上。
data被分为3个属性:type,scheme,authority/path 任何设置的属性intent必须匹配上。
设置了scheme 而没设type,则intent也必须类似,不能设置type,也不能是content: URI.
设置了type而没设scheme:将匹配上没有URI的intent,或者content:,file:的uri。
设置了authority:必须指定一个或多个相关联的schemes
设置了path:唏嘘指定一个或多个相关联的schemes
匹配规则:
IntentFilter 匹配Intent的上的条件:
Action : 值相同 ,或则IntentFilter未指定action.
DataType:. 系统通过调用Intent.resolve(ContentResolver)获取type,通配符*
在Intent/IntentFilter的MIME type中使用,区分大小写
DataScheme:系统通过调用Intent. getData() and Uri.getScheme())获取scheme, 区分大小写
DataAuthority:必须有一个dataScheme匹配上且authority值匹配上,或者IntentFilter没有定义。 Intent. getData() and Uri.getAuthority()获取authority.
DataPath: scheme and authority必须先匹配上 ntent. getData() and Uri.getPath(),获取. 或者IntentFilter没有定义
Categories:all of the categories in the Intent match categories given in the filter 多余的Categorie,不影响intent匹配,如果IntentFilter
没有指定Categorie,则只能匹配上没有Categorie的intent。
常用intent列表:
Android Intent 用法汇总
显示网页
- <activity android:name="BrowserActivity" android:label="Browser" android:launchMode="singleTask" android:alwaysRetainTaskState="true" android:configChanges="orientation|keyboardHidden" android:theme="@style/BrowserTheme">
- <!--
For these schemes were not particular MIME type has been
supplied, we are a good candidate.
-->
- <intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="http" />
<data android:scheme="https" />
<data android:scheme="about" />
</intent-filter>
- <!--
For these schemes where any of these particular MIME types
have been supplied, we are a good candidate.
-->
- <intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.BROWSABLE" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="http" />
<data android:scheme="https" />
<data android:mimeType="text/html" />
<data android:mimeType="text/plain" />
<data android:mimeType="application/xhtml+xml" />
<data android:mimeType="application/vnd.wap.xhtml+xml" />
</intent-filter>
- <!--
We are also the main entry point of the browser.
-->
- <intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.LAUNCHER" />
<category android:name="android.intent.category.BROWSABLE" />
</intent-filter>
- <intent-filter>
<action android:name="android.intent.action.WEB_SEARCH" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="" />
<data android:scheme="http" />
<data android:scheme="https" />
</intent-filter>
- <intent-filter>
<action android:name="android.intent.action.WEB_SEARCH" />
<action android:name="android.intent.action.MEDIA_SEARCH" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
- <intent-filter>
<action android:name="android.intent.action.SEARCH" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
<meta-data android:name="android.app.searchable" android:resource="@xml/searchable" />
- <intent-filter>
<action android:name="android.net.http.NETWORK_STATE" />
<action android:name="android.intent.action.PROXY_CHANGE" />
</intent-filter>
</activity>
1. Uri uri = Uri.parse("http://google.com");
2. Intent it = new Intent(Intent.ACTION_VIEW, uri);
3. startActivity(it);
显示地图
1. Uri uri = Uri.parse("geo:38.899533,-77.036476");
2. Intent it = new Intent(Intent.ACTION_VIEW, uri);
3. startActivity(it);
4. //其他 geo URI 範例
5. //geo:latitude,longitude
6. //geo:latitude,longitude?z=zoom
7. //geo:0,0?q=my+street+address
8. //geo:0,0?q=business+near+city
9. //google.streetview:cbll=lat,lng&cbp=1,yaw,,pitch,zoom&mz=mapZoom
路径规划
1. Uri uri = Uri.parse("http://maps.google.com/maps?f=d&saddr=startLat%20startLng&daddr=endLat%20endLng&hl=en");
2. Intent it = new Intent(Intent.ACTION_VIEW, uri);
3. startActivity(it);
4. //where startLat, startLng, endLat, endLng are a long with 6 decimals like: 50.123456
打电话
1. //叫出拨号程序
2. Uri uri = Uri.parse("tel:0800000123");
3. Intent it = new Intent(Intent.ACTION_DIAL, uri);
4. startActivity(it);
1. //直接打电话出去
2. Uri uri = Uri.parse("tel:0800000123");
3. Intent it = new Intent(Intent.ACTION_CALL, uri);
4. startActivity(it);
5. //用這個,要在 AndroidManifest.xml 中,加上
6. //<uses-permission , strPackageName, null);
2. Intent it = new Intent(Intent.ACTION_DELETE, uri);
3. startActivity(it);